'use strict';
var util = require('util');
var DataType = require('./data-type.js');
/**
* @classdesc Provide methods to work with Boolean data.
* @description Creates Boolean data type definition.
*
* @memberof bo.dataTypes
* @constructor
*
* @extends bo.dataTypes.DataType
*/
function Boolean () {
// Immutable object.
DataType.call(this);
}
util.inherits(Boolean, DataType);
/**
* Checks if value is a Boolean data.
*
* @function bo.dataTypes.Boolean#parse
* @param {*} [value] - The value to check.
* @returns {*} The Boolean value or null when the input value is valid, otherwise undefined.
*/
Boolean.prototype.parse = function (value) {
if (value === null || typeof value === 'boolean')
return value;
if (value === undefined)
return null;
if (value instanceof Boolean)
return value.valueOf();
if (value.toString().trim().toLowerCase() === 'false')
return false;
return global.Boolean(value).valueOf();
};
/**
* Checks if value is a Boolean data and is not null.
*
* @function bo.dataTypes.Boolean#hasValue
* @param {data} value - The value to check.
* @returns {boolean} True if the value is Boolean and not null, otherwise false.
*/
Boolean.prototype.hasValue = function (value) {
var parsed = this.parse(value);
return parsed !== undefined && parsed !== null;
};
module.exports = Boolean;